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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <boot_device.h>
#include <spi_flash.h>
#include <spi-generic.h>
#include <stdint.h>
static struct spi_flash sfg;
static bool sfg_init_done;
static ssize_t spi_readat(const struct region_device *rd, void *b,
size_t offset, size_t size)
{
if (spi_flash_read(&sfg, offset, size, b))
return -1;
return size;
}
static ssize_t spi_writeat(const struct region_device *rd, const void *b,
size_t offset, size_t size)
{
if (spi_flash_write(&sfg, offset, size, b))
return -1;
return size;
}
static ssize_t spi_eraseat(const struct region_device *rd,
size_t offset, size_t size)
{
if (spi_flash_erase(&sfg, offset, size))
return -1;
return size;
}
static const struct region_device_ops spi_ops = {
.readat = spi_readat,
.writeat = spi_writeat,
.eraseat = spi_eraseat,
};
static const struct region_device spi_rw =
REGION_DEV_INIT(&spi_ops, 0, CONFIG_ROM_SIZE);
static void boot_device_rw_init(void)
{
const int bus = CONFIG_BOOT_DEVICE_SPI_FLASH_BUS;
const int cs = 0;
if (sfg_init_done == true)
return;
/* Ensure any necessary setup is performed by the drivers. */
spi_init();
if (!spi_flash_probe(bus, cs, &sfg))
sfg_init_done = true;
}
const struct region_device *boot_device_rw(void)
{
/* Probe for the SPI flash device if not already done. */
boot_device_rw_init();
if (sfg_init_done != true)
return NULL;
return &spi_rw;
}
const struct spi_flash *boot_device_spi_flash(void)
{
boot_device_rw_init();
if (sfg_init_done != true)
return NULL;
return &sfg;
}
int boot_device_wp_region(const struct region_device *rd,
const enum bootdev_prot_type type)
{
uint32_t ctrlr_pr;
/* Ensure boot device has been initialized at least once. */
boot_device_init();
const struct spi_flash *boot_dev = boot_device_spi_flash();
if (boot_dev == NULL)
return -1;
if (type == MEDIA_WP) {
if (spi_flash_is_write_protected(boot_dev,
region_device_region(rd)) != 1) {
return spi_flash_set_write_protected(boot_dev,
region_device_region(rd), true,
SPI_WRITE_PROTECTION_REBOOT);
}
/* Already write protected */
return 0;
}
switch (type) {
case CTRLR_WP:
ctrlr_pr = WRITE_PROTECT;
break;
case CTRLR_RP:
ctrlr_pr = READ_PROTECT;
break;
case CTRLR_RWP:
ctrlr_pr = READ_WRITE_PROTECT;
break;
default:
return -1;
}
return spi_flash_ctrlr_protect_region(boot_dev,
region_device_region(rd), ctrlr_pr);
}
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